UK Grid Live

What's powering Britain right now

— gCO₂/kWh

Moderate

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What's powering Britain right now

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Today's grid story

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Greenest window today

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Where in Britain is the grid cleanest?

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— gCO₂/kWh

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Generation mix

Data from National Grid ESO Carbon Intensity API

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What is carbon intensity?

Carbon intensity is a measure of how much CO₂ is released for every unit of electricity generated — expressed in grams of CO₂ per kilowatt-hour (gCO₂/kWh). When the grid runs on wind, solar, hydro and nuclear, intensity is low. When gas and coal pick up the slack, it rises.

The figures shown here come from the National Grid ESO Carbon Intensity API, which is updated every 30 minutes and includes forecasts for the next 48 hours.

Why time-shifting matters. If you can run heavy appliances — dishwasher, washing machine, EV charger — during the greenest window of the day, the same task produces less CO₂. The grid does the cleaning; you choose when.

The band thresholds (very low, low, moderate, high, very high) come from the API itself and are updated by National Grid ESO as the grid decarbonises over time.